Annealing cover



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ANNEALING CO'VER.

Application filed November 8, 1923. Serial No. 673,560.

To all whom it may concern:

Be it known that I, WILLIAM SHAW, subject of the King of Great Britain and Ireland, of the Wellington Cast Steel Foundry, 'lhe Marshes, Middlesbrough, in the county of York, England, have invented certain new and useful Improvements in or Bela ting to an Improved annealing (lover, of which the following is a specification.

This invention relates to annealing covers having an open bottom resting on a base plate and adapted to be placed over the articles to be annealed, more particularly in cases wherein iron or steel sheets, or wire, or other material is to be close-annealed and the object of this invention is to provide an improved cover of this kind which will withstand the heat of the annealing furnace for a longer period without becoming distorted.

An annualing cover of the type described, constructed in accordance with this inven= tion, characterized in that it is made of steel cast in one piece and preferably provided on some 01' all of its sides and ends, with a network of internal strengthening ribs. Lugs or trunnions for lifting the cover may be cast on its outside or riveted to same.

One form of annealing cover made in accordance with this invention is illustrated in the accompanying drawings, in which Fig. 'l is a part section side elevation.

Fig. 2 is a transverse sectional elevation taken on line 22 of Fig. l, and

F 1g. 3 is an inverted plan view.

a. is the open-bottomed cover. The sides I) Z) and end 0 a slope slightly outwards from top to bottom. The top cl is domed as shown more particularly in Fig. 2. e are external strengthening ribs disposed diagonally on the domed top d, and are external strengthening ribs or flanges disposed around the bottom edges of the sides 5 and ends 6. gg are internal longitudinal and transverse strengthening ribs disposed on the sides, ends and top of the cover forming a network. 7i are lifting lugs provided externally on the sides and ends of the cover. 7' are projections disposed externally on the corners of the cover for strengthening purposes. The cover together with the external and internal strengthening ribs and lifting lugs are made of steel all cast in one piece.

By casting ribs on the interior of the walls of a cast steel annealing cover, the said walls are materially strengthened, and there is less liability of the ribs buckling and so distorting the cover as the temperature inside the cover when in the annealing furnace is approximately 100 degrees centigrade less than the temperature outside the cover.

\Vhat- I claim and desire to secure by Letters Patent is 1. An annealing cover made of metal cast in one piece, and having top, side and end walls and an open bottom, the top being domed-shaped, exteriorly arranged ribs on said cover, said ribs radiatingfrom its center, a net-work of ribs on the interior of said cover and a strengthening rib on the lower edge of the ends and side walls of the cover.

2. An annealing cover made of metal cast in one piece and having top, side and end walls and an open bottom, the top having external strengthening ribs thereon extending diagonally there-across from corner to corner and crossed at their center portion.

3. An annealing cover made of metal cast in one piece and having top, side and ends walls and open bottom, a net work of strengthening ribs on the interior surface of said walls consisting of unbroken longitudinal and transverse ribs extending over and from the end, side and top walls.

4-. An annealing cover made of metal cast in one piece and having top, side and end walls and open bottom, a net work of strengthening ribs on the interior surface of said walls consisting of unbroken longitudinal and transverse ribs extending over and from the end, side and top walls, the intermediate portions of certain of said ribs being staggeredly arranged between cross ribs.

5. An annealing cover made of metal cast in one piece, and having top, side and end walls and an open bottom, the top being dome shaped and having exterior strengthening ribs thereon radiating from its center, and external reinforcing ribs at the corners of said end and side walls only.

In testimony whereof, I aflix my signature.

WILLIAM SHW. 

